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Editorial Team
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Asked: 2026-05-28T05:26:00+00:00

I am trying to Read HBase table TableMapReduceUtil and dump data into HDFS (Don’t

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I am trying to Read HBase table TableMapReduceUtil and dump data into HDFS (Don’t ask me why. It is weired but don’t have any other option). So, to achieve that, I want to manipulate final file names (emitted by reducer) w.r.t the reducer key.

On the mapper side I was able to dump hbase rotryingws to HDFS in default order. But to override reducer outputfile format (name as per key), I figured out that MultipleOutputFormat class for reducer (which is absent on 0.20 due to some interface mess up, read somewhere) and the old one takes only JobConf. But if I try to write the code with old JobConf, I am not able to Use HBase 0.90’s TableMapReduceUtil which only takes Job class

Doesn’t have much handson with Hadoop/HBase. Had spent some time modifying existing MRJObs.
It seems I am stuck with my approach.

Versions Hadoop-Core-0.20.;HBase 0.90.1

Thanks
Pankaj

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1 Answer

  1. Editorial Team

    I am not able to Use HBase 0.90’s TableMapReduceUtil which only takes Job class.

    There are org.apache.hadoop.hbase.mapred.TableMapReduceUtil and org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil classes. The first will take JobConf (old MR API) and the second will take Job (new MR API). Use the appropriate TableMapReduceUtil class.

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